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29 people were injured after the explosion at Parsons Green tube station

Officers attended a property in Hownslow on the same day at around 11.50pm, and a 21-year-old man was arrested.

A warrant for his further detention was granted by Westminster Magistrates' Court until 21 September.

A 25-year-old man was arrested at an address in Newport, South Wales at around 7pm on Tuesday (September 19).

A 48-year-old man and a 30-year-old man were arrested at around 5.10am on Wednesday (September 2), at a second address in Newport.

All six males are in custody at a south London police station.

Commander Dean Haydon, head of the Met Counter Terrorism Command, said: "This continues to be a fast-moving investigation. A significant amount of activity has taken place since the attack on Friday.

"We now have six males in custody and searches are continuing at five addresses. Detectives are carrying out extensive inquiries to determine the full facts behind the attack.

"We anticipate that the searches will take some days to complete and may cause further disruption. However, it is important that we continue with these searches and I'd like to thank all those affected for their support, patience and cooperation.

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"As police and our partners do all we can to confront the threat, public vigilance remains as vital as ever.

"We urge the public to report any suspicious activity to the police by calling us, in confidence, on 0800 789 321, or in an emergency by dialling 999.

"We are asking the public to look out for anything that seems out of place, unusual or just doesn't seem to fit in with day-to-day life. It may be nothing, but if you see or hear anything that could be terrorist-related, trust your instincts, then act, and call us."